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https://issues.apache.org/jira/browse/SOLR-14928?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17284056#comment-17284056
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ASF subversion and git services commented on SOLR-14928:
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Commit 23755ddfdd36a9613010cb9e6201127df55be744 in lucene-solr's branch
refs/heads/master from Ilan Ginzburg
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=23755dd ]
SOLR-14928: allow cluster state updates to be done in a distributed way and not
through Overseer (#2364)
> Remove Overseer ClusterStateUpdater
> -----------------------------------
>
> Key: SOLR-14928
> URL: https://issues.apache.org/jira/browse/SOLR-14928
> Project: Solr
> Issue Type: Sub-task
> Components: SolrCloud
> Reporter: Ilan Ginzburg
> Assignee: Ilan Ginzburg
> Priority: Major
> Labels: cluster, collection-api, overseer
> Time Spent: 2h 10m
> Remaining Estimate: 0h
>
> Remove the Overseer {{ClusterStateUpdater}} thread and associated Zookeeper
> queue at {{<_chroot_>/overseer/queue}}.
> Change cluster state updates so that each (Collection API) command execution
> does the update directly in Zookeeper using optimistic locking (Compare and
> Swap on the {{state.json}} Zookeeper files).
> Following this change cluster state updates would still be happening only
> from the Overseer node (that's where Collection API commands are executing),
> but the code will be ready for distribution once such commands can be
> executed by any node (other work done in the context of parent task
> SOLR-14927).
> See the [Cluster State
> Updater|https://docs.google.com/document/d/1u4QHsIHuIxlglIW6hekYlXGNOP0HjLGVX5N6inkj6Ok/edit#heading=h.ymtfm3p518c]
> section in the Removing Overseer doc.
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